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HURRICANE GERT FORECAST/ADVISORY NUMBER  23
NATIONAL WEATHER SERVICE MIAMI FL   AL0999
0300Z FRI SEP 17 1999
 
HURRICANE CENTER LOCATED NEAR 19.4N  54.6W AT 17/0300Z
POSITION ACCURATE WITHIN  15 NM
 
PRESENT MOVEMENT TOWARD THE WEST NORTHWEST OR 300 DEGREES AT  9 KT
 
ESTIMATED MINIMUM CENTRAL PRESSURE  941 MB
EYE DIAMETER  25 NM
MAX SUSTAINED WINDS 115 KT WITH GUSTS TO 140 KT
64 KT.......100NE  75SE  50SW  90NW
50 KT.......140NE 120SE  90SW 130NW
34 KT.......175NE 150SE 125SW 160NW
12 FT SEAS..500NE 500SE 300SW 400NW
ALL QUADRANT RADII IN NAUTICAL MILES
 
REPEAT...CENTER LOCATED NEAR 19.4N  54.6W AT 17/0300Z
AT 17/0000Z CENTER WAS LOCATED NEAR 19.1N  54.1W
 
FORECAST VALID 17/1200Z 20.1N  55.8W
MAX WIND 115 KT...GUSTS 140 KT
64 KT...100NE  75SE  50SW  90NW
50 KT...140NE 120SE  90SW 130NW
34 KT...175NE 150SE 125SW 160NW
 
FORECAST VALID 18/0000Z 21.5N  57.4W
MAX WIND 115 KT...GUSTS 140 KT
64 KT...100NE  75SE  50SW  90NW
50 KT...140NE 120SE  90SW 130NW
34 KT...175NE 150SE 125SW 160NW
 
FORECAST VALID 18/1200Z 22.8N  58.7W
MAX WIND 115 KT...GUSTS 140 KT
64 KT...100NE  75SE  50SW  90NW
50 KT...140NE 120SE  90SW 130NW
34 KT...175NE 150SE 125SW 160NW
 
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 19.4N  54.6W
 
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE
 
OUTLOOK VALID 19/0000Z 24.5N  60.0W
MAX WIND 115 KT...GUSTS 140 KT
50 KT...140NE 120SE  90SW 130NW
 
OUTLOOK VALID 20/0000Z 28.0N  62.0W
MAX WIND 115 KT...GUSTS 140 KT
50 KT...140NE 120SE  90SW 130NW
 
NEXT ADVISORY AT 17/0900Z
 
FRANKLIN
 
STRIKE PROBABILITIES ASSOCIATED WITH THIS ADVISORY NUMBER CAN BE
FOUND UNDER AFOS HEADER MIASPFAT4 AND WMO HEADER WTNT74 KNHC.
 
 
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